Add option to use starting value as local solution for presolve (with changes)

[harshangrjn]

@blegat Made a few minor renaming modifications to your PR (#218). Since I can't push the changes there, creating a separate one here. Tested a bit but looks like it doesn't run with starting points for both linear and NL objective (may be I am missing something). For example, try running examples/run_examples.jl. nlp1 and nlp3 are the NLPs. This error shows up for nlp3:

ERROR: LoadError: No nonlinear objective.
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:35
  [2] eval_objective
    @ ~/.julia/packages/MathOptInterface/MMUy6/src/Nonlinear/ReverseAD/mathoptinterface_api.jl:167 [inlined]
  [3] eval_objective(evaluator::MathOptInterface.Nonlinear.Evaluator{MathOptInterface.Nonlinear.ReverseAD.NLPEvaluator}, x::Vector{Float64})
    @ MathOptInterface.Nonlinear ~/.julia/packages/MathOptInterface/MMUy6/src/Nonlinear/evaluator.jl:116

[codecov]

Codecov Report

Merging #219 (1fb1053) into master (de2b6ca) will decrease coverage by 0.02%.
The diff coverage is 89.58%.

❗ Current head 1fb1053 differs from pull request most recent head 7765919. Consider uploading reports for the commit 7765919 to get more accurate results

@@            Coverage Diff             @@
##           master     #219      +/-   ##
==========================================
- Coverage   87.26%   87.24%   -0.03%     
==========================================
  Files          16       16              
  Lines        2977     2988      +11     
==========================================
+ Hits         2598     2607       +9     
- Misses        379      381       +2     

Impacted Files	Coverage Δ
src/nlexpr.jl	91.44% <ø> (-0.03%)	⬇️
src/log.jl	90.16% <75.00%> (ø)
src/main_algorithm.jl	85.26% <82.60%> (-0.09%)	⬇️
src/MOI_wrapper/MOI_wrapper.jl	84.18% <100.00%> (ø)
src/bounding_model.jl	87.93% <100.00%> (ø)
src/heuristics.jl	73.07% <100.00%> (ø)
src/multilinear.jl	86.56% <100.00%> (ø)
src/presolve.jl	85.09% <100.00%> (-0.10%)	⬇️
src/solver_options.jl	100.00% <100.00%> (ø)
src/utility.jl	87.79% <100.00%> (ø)
... and 1 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[blegat]

Oops, should be fixed in #218